INFLUENCE OF TEMPERATURE AND HUMIDITY IN BLOOMING PHENOPHASE CONCERNING ON FRUIT SET IN SOME TABLE GRAPES (VITIS VINIFERA L.)

Published in Scientific Papers. Series B, Horticulture, Volume LXI
Written by Marinela Vicuţa STROE, Toniţa Valentina DUNUŢĂ, Daniel Nicolae COJANU

The aim of this study was to determine the influence of temperature and humidity on blooming phenophase and also on the percentage of fruit set of three table grapes varieties such as Muscat Hamburg cv., Afuz Ali and Victoria cv. (Vitis vinifera L). For assessing the optimal timing analysis it was used a grading system called BBCH which is a universal scale for describing monocots and dicots numbered from 00-97, a special focus was made on the principal growth stage blooming and includes stages 61 and 67 and growth stage of fruit development stages 71 and 77. Results shows that there was a direct correlation between the average values of two analyzed factors and percent of fruit set, and also the size of fruits. Average temperatures below + 20ºC during blooming and a relative humidity of 65% has determined a good percentage binding at Muscat Hamburg (63%), followed by Afuz Ali variety (80%) and Victoria variety (86%). Surprisingly, even though the last two variety have formed more berries during the process of fecundation, proportion of very small berries (2-4 mm) and small berries(6-7mm) was high situated between 51.07% and 55.24%.

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STROE M.V., DUNUŢĂ T.V., COJANU D.N. 2017, INFLUENCE OF TEMPERATURE AND HUMIDITY IN BLOOMING PHENOPHASE CONCERNING ON FRUIT SET IN SOME TABLE GRAPES (VITIS VINIFERA L.). Scientific Papers. Series B, Horticulture, Volume LXI, Print ISSN 2285-5653, 269-276.


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